sd-ai is an open source project that provides a web service to act as an intermediary between Stella, or any model development software, and commercial AI engines. The project is houSsed on github, and uses the open source MIT License.
The intent of the gateway is to speed the evolution of AI supported model development by encouraging community involvement. By creating a bridge between model development environments such as Stella and the underlying AI engines it can help accelerate research in this area.
isee systems hosts a version of this gateway on ai.iseesystems.com, that Stella will point to by default. As the scope and function SD-AI is rapidly evolving the project itself is the best source of documentation on how it works.